fix: upgrade @sourcegraph/extensions-client-common to fix CSS

Incorporates sourcegraph/extensions-client-common#67 to fix https://github.com/sourcegraph/sourcegraph/issues/629.

build: still generate xpi

fix: access token logic (#267)

This commit fixes access token usage by:

- Not setting the `authorization` header when
requesting from the options page.
Chrome suddenly becan rejecting the request in
pre-flight checks from hte options page.
- _Only_ creating access tokens when the server connection is checked in the
options page.
- Save the access token ID so we can ensure it still exists on the
server.

feat: support running extensions on private code without a private So…

…urcegraph instance (#249)

fix: more robust scraping to support org level repos (#219)

chore: run prettier

New inject feature flag (#203)

build: debugging release build

feat: use new Sourcegraph extension API

Also:

- run extension host in web worker, also pass init data
- expose queryLSP (and queryGraphQL) to extensions

build(deps): bump e-c-c (#158)